A3581 Gems Eng Pressure 2004

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From 2 to 6000 PSI, GEMS Pressure Switches Cover A Wide Range of Applications General, vacuum, differential, specialty Field-adjustable or factory set switches High proof pressure Rugged and dependable GEMS offers a choice of pressure switches, from compact cylindrical models for OEM use, to larger, enclosed units for rugged process applications. These switches are ideal for the filtering process of coolants in the machine tool industry, use in transmissions of off-highway vehicles and as redundant systems with existing monitors such as transducers. Unique Piston/Diaphragm Design A piston/diaphragm design, incorporating the high proof pressure of piston technology allows these switches to operate with the sensitivity and accuracy of a diaphragm design. Repeatability ranges from 2 percent to 5 percent of the highest set point. Many Materials To Choose From Enclosures include aluminum, stainless steel, brass, reinforced plastic and zinc-plated steel. Most models are NEMA 4 or NEMA 4X certified. Wetted parts include a diaphragm available in buna-n, Teflon® coated Kapton®, stainless steel, PTFE, EPDM or Viton® and a pressure port available in stainless steel, brass, zinc or aluminum. Pressure Switch Option Descriptions G: Gold contacts are usually required for low DC current loads (
PRESSURE SWITCHES PRESSURE SWITCHES www.gems-sensors.co.uk Selection Guide Pressure Switches 6 Pressure Switches Vacuum Switches Differential Switches Speciality Switches Industrial Switches Plastic Diaphragms Pressure Range Proof Pressure Switch Repeatability Notes Series Page 40 to 800 mbar 10 bar SPST, SPDT (0.55 to 12 psi) (150 psi) DPST, DPDT ±2% - PS11 7 0.14 to 10 bar 35 bar Kapton® Diaphragm PS31 8 SPST ±5% (2 to 150 psi) (500 psi) Elastomer Diaphragm PS32 9 0.2 to 7 bar 25 bar (3 to 100 psi) (350 psi) SPST, SPDT ±2% - PS41 10 1 to 20 bar 35 bar Kapton® Diaphragm PS51 11 SPST ±5% (15 to 300 psi) (500 psi) Elastomer Diaphragm PS52 12 0.35 to 207 bar 600 bar (5 to 3000 psi) (9000 psi) 0.7 to 344 bar 600 bar (10 to 5000 psi) (9000 psi) SPST ±3% - PS61 13 SPST, SPDT ±2% - PS71 14 0.35 to 414 bar 600 bar SPST, SPDT - PS75 16 ±2% (5 to 6000 psi) (9000 psi) DPST, DPDT 20 Amp Switching PS77 18 25 to 508 mbar 10 bar SPST, SPDT (0.75" to 15" Hg) (150 psi) DPST, DPDT 169 to 1016 mbar 35 bar (5" to 30" Hg) (500 psi) 169 to 1016 mbar 10 bar (5' to 30" Hg) (150 psi) 0.3 to 1.7 bar 100 bar (5 to 25 psi) (1500 psi) 0.7 to 3 bar 35 bar (10 to 45 psi) (500 psi) ±2% - PS81 20 SPST, SPDT ±2% - PS82 21 SPST ±3% - PS83 22 SPDT ±2% - PS91 23 SPDT ±2% - PS93 24 2 to 10 bar 100 bar - PS96 25 ±2% (30 to 150 psi) (1500 psi) - PS97 25 0 to 400 bar (0 to 6000 psi) -1 to 540 bar (30" Hg to 7500 psi) -1 to 540 bar (30" Hg to 7500 psi) Option K or Standard Teflon® Coated Kapton® (Polyimide) Diaphragm Teflon® is compatible with almost every liquid and gaseous media. Kapton® has very stable Elastomer Diaphragms Elastomers offer incredible sensitivity coupled with extremely long life. This results in stable setpoints over the life of the pressure switch as well as tight deadbands. Their biggest weakness is the increase in modulus (stiffening) that occurs at lower temperatures. This results in pressure switch setpoints to shift higher and deadbands to increase with decreasing temperature. They also exhibit more hysteresis than Kapton diaphragms. Standard: Nitrile (Buna-N). Typically specified on water and petroleum based hydraulic oils. Temperature range: 0°C to 121°C (32°F to 250°F) See Specs Relay or Transistor .25% Solid State PS98 26 600 bar SPDT ±0.5% - PS-B 27 See Specs SPDT ±0.2% - PS-C 28 physical properties over a wide temperature range -73°C to 200°C (-100°F to 400°F). This results in pressure switches that exhibit very little setpoint shift due Option V: Viton® (Flourinated Hydrocarbon) Diaphragm. Typically used with alcohols, diesters, solvents, acids and synthetic oils. Also used for high vacuum service. Temperature range: 0°C to 200°C (32°F to 400°F) Option E: EPDM (Ethylene Propylene) Diaphragm. Typically used with phosphate ester based hydraulic fluids, brake fluids, ketones, steam and hot water. Temperature range: -53°C to 100°C (-65°F to 212°F) to temperature extremes. Kapton possesses exceptional fatigue strength but is very stiff which results in wider but more stable deadbands than most elastomers. Option N: Neoprene (Chloroprene) Diaphragm. Typically specified for refrigerant systems. Temperature range: -53°C to 135°C (-65°F to 275°F) Option H: ECOH (Epichlorohydrin) Diaphragm. Typically specified for petroleum based fuels and lubricants. Temperature range: -40°C to 121°C (-40°F to 250°F)
Page 2 and 3: Contents Description Page Cross Ref
Page 6 and 7: PS11 - Ultra-Long Life OEM Pressure
Page 8 and 9: PS32 - Elastomer Diaphragm OEM Subm
Page 10 and 11: PS51 - Kapton® Diaphragm OEM Submi
Page 12 and 13: PS61 - OEM Subminiature Pressure Sw
Page 14 and 15: How to Order Use the Bold character
Page 20 and 21: PS82 - Economical Miniature Vacuum
Page 22 and 23: PS91 - Compact Differential Switch
Page 24 and 25: PS96/97 - Inline Pressure Switch 2
Page 26 and 27: PS-B Series - High Performance Pres
Page 28 and 29: Dimensions Type 104 (4”) ø.7 (ø
Page 30 and 31: Adjustable Typical Max.Static Max.

A3581 Gems Eng Pressure 2004

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